luoyuxia commented on code in PR #19545:
URL: https://github.com/apache/flink/pull/19545#discussion_r857373139
##########
flink-table/flink-sql-parser/src/main/codegen/includes/parserImpls.ftl:
##########
@@ -574,13 +575,18 @@ SqlAlterTable SqlAlterTable() :
startPos.plus(getPos()));
}
|
- <DROP> <CONSTRAINT>
- constraintName = SimpleIdentifier() {
- return new SqlAlterTableDropConstraint(
- tableIdentifier,
- constraintName,
- startPos.plus(getPos()));
- }
+ <DROP>
+ (
+ <CONSTRAINT> constraintName = SimpleIdentifier() {
+ return new SqlAlterTableDropConstraint(
+ tableIdentifier,
+ constraintName,
+ startPos.plus(getPos()));
+ }
+ |
+ [ <IF> <EXISTS> { ifExists = true; } ]
Review Comment:
Should it be `<IF> <EXISTS> <PARTITION>`? what if a sql statement like
`alter table drop table`? Seems it will also fall back to `SqlDropPartitions`.
Maybe it's a little confused that any `drop` except for `CONSTRAINT` will
fall back to `SqlDropPartitions`. It may bring some complexity when try to
support other `drop`.
##########
flink-table/flink-sql-parser/src/main/codegen/includes/parserImpls.ftl:
##########
@@ -595,6 +601,38 @@ SqlAlterTable SqlAlterTable() :
)
}
+/**
+* ALTER TABLE table_name DROP [IF EXISTS] PARTITION partition_spec[, PARTITION
partition_spec, ...]
Review Comment:
nit:
```suggestion
* ALTER TABLE table_identifier DROP [IF EXISTS] PARTITION partition_spec[,
PARTITION partition_spec, ...]
```
##########
flink-table/flink-sql-parser/src/test/java/org/apache/flink/sql/parser/FlinkSqlParserImplTest.java:
##########
@@ -338,6 +338,26 @@ void testAlterTableCompact() {
.fails("(?s).*Encountered \"\\)\" at line 1, column 26.\n.*");
}
+ @Test
+ public void testDropPartition() {
+ sql("alter table tbl drop if exists partition (p=1)")
Review Comment:
nit: add a test for alter table like `c1.d1.tbl`.
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